HeinOnline's Tip of the Week: How to Find a Treaty That Was Signed on a Specific Date

Are you looking for a treaty that was signed on a specific date, or was entered into force on a certain date? If so, this tip will be helpful to you. In the Treaties & Agreements Library, the Treaty Metadata Search allows you to search across a number of metadata fields including treaty numbers, KAV numbers, parties, countries and even specific dates. When searching by date, you must use the YYYY-MM-DD format when inserting the syntax into the search box. Let's take a look at an example.

We want to find a treaty regarding fisheries that was entered into force on March 18, 1985 between the United States and Canada. To find this treaty, open the Treaties & Agreements Library. From the search tab, click on the Treaty Metadata Search option.

Enter the date into the first search box in the YYYY-MM-DD format, 1985-03-18. Then, select In Force Dates from the drop down menu. Now, enter fisheries into the second box and select Short Title from the drop down menu. Then click search.


We get 1 result that is an exact match to the treaty we are searching for. From our result, we can link to the full text of the treaty, or view a summary of key information about the treaty.

Let's look at another example. Now, we want to find the text of the treaty signed on October 19, 1977, which established the Joint Defense Space Research Facility between the U.S. and Australia. Enter the date into the first field as 1977-10-17. Select Signing Dates from the drop down menu. Enter Australia into the next search box, select Country Name from the drop down menu, and click search.

This will give us 1 result that is an exact match to the treaty we are searching for.

When using any of the date fields from the Treaty Metadata Search, always remember to use the YYYY-MM-DD format.

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